Welcome to the Mosman Prep Old Boys Union website. Please also see useful Old Boys links on the left of this page.

The Old Boys Union was established in 2004 to coincide with the Mosman Prep’s 100th anniversary, and it now has approximately 650 members spread across recent leavers that are now at high school to those that left more than 70 years ago. Since the school’s inception, over 4000 students have attended Mosman Prep, and we are always keen to encourage more old boys to join the union. 

The fundamental goals of the union are to enable old boys to maintain their earliest friendships, and to keep them connected with the school. Having an Old Boys Union is somewhat unique amongst primary schools, and is evidence of the special attachment that old boys have for Mosman Prep. 

Each year we have a distinguished speaker who is either an old boy or has a special attachment to the school. In 2014, our keynote speaker was Allan Bradley, who had been Headmaster at Mosman Prep from 1962 to 1977. In 2015, we were fortunate to have Roger Corbett (1956 leaver and former CEO of Woolworths) who captivated the audience with rich tales of his time at Mosman Prep. In 2016 we had David Handley (1977 leaver and founder of Sculpture by the Sea) as our guest speaker, which was a very interesting and enjoyable evening.

The Annual Dinner is a truly special event because it is a mix of old boys from all eras.  The 2016 dinner had leavers from the 1930s mixed in with leavers from the early 2000s, making for some great conversations. Despite the age gap, we all had many shared experiences from our early lives at Mosman Prep.

Should you have any questions, please feel free to reach out to the Old Boys Union Committee.

We look forward to hearing from you, and welcoming new members to the union.

James Houstone
President MPOBU
2015 - 2018


Founded in 1904, Mosman Prep (as it is fondly called) is renowned as a specialist preparatory school for boys. Our slogan 'Educating for Tomorrow, Today' encapsulates a focus on being forward looking in readiness for the complexities of the world in which the boys will live. The School is of a size where every boy is known personally. The School has two classes in each year group and a total of nearly 300 Students in the fourteen classes.

Address: 75 Shadforth St, Mosman - Phone: 9968 4044 - Wet Weather Phone: 9990 9196 - Fax: 61 2 9960 1647 - Postal Address: PO Box 950, Spit Junction, NSW 2088

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